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using System;
using NUnit.Framework;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.Sec;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Utilities.Encoders;
using Org.BouncyCastle.Utilities.Test;
namespace Org.BouncyCastle.Tests
{
[TestFixture]
public class ECNRTest
: SimpleTest
{
private static readonly byte[] k1 = Hex.Decode("d5014e4b60ef2ba8b6211b4062ba3224e0427dd3");
private static readonly byte[] k2 = Hex.Decode("345e8d05c075c3a508df729a1685690e68fcfb8c8117847e89063bca1f85d968fd281540b6e13bd1af989a1fbf17e06462bf511f9d0b140fb48ac1b1baa5bded");
private readonly SecureRandom random = FixedSecureRandom.From(k1, k2);
/**
* X9.62 - 1998,<br/>
* J.3.2, Page 155, ECDSA over the field Fp<br/>
* an example with 239 bit prime
*/
[Test]
public void TestECNR239bitPrime()
{
BigInteger r = new BigInteger("308636143175167811492623515537541734843573549327605293463169625072911693");
BigInteger s = new BigInteger("852401710738814635664888632022555967400445256405412579597015412971797143");
byte[] kData = new BigInteger("700000017569056646655505781757157107570501575775705779575555657156756655").ToByteArrayUnsigned();
SecureRandom k = FixedSecureRandom.From(kData);
X9ECParameters p = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime239v1);
ECDomainParameters spec = new ECDomainParameters(p.Curve, p.G, p.N, p.H);
ECCurve curve = spec.Curve;
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("876300101507107567501066130761671078357010671067781776716671676178726717"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.DecodePoint(Hex.Decode("025b6dc53bc61a2548ffb0f671472de6c9521a9d2d2534e65abfcbd5fe0c70")), // Q
spec);
ISigner sgr = SignerUtilities.GetSigner("SHA1withECNR");
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
checkSignature(239, priKey, pubKey, sgr, k, message, r, s);
}
// -------------------------------------------------------------------------
/**
* X9.62 - 1998,<br/>
* Page 104-105, ECDSA over the field Fp<br/>
* an example with 192 bit prime
*/
[Test]
public void TestECNR192bitPrime()
{
BigInteger r = new BigInteger("2474388605162950674935076940284692598330235697454145648371");
BigInteger s = new BigInteger("2997192822503471356158280167065034437828486078932532073836");
byte[] kData = new BigInteger("dcc5d1f1020906df2782360d36b2de7a17ece37d503784af", 16).ToByteArrayUnsigned();
SecureRandom k = FixedSecureRandom.From(kData);
X9ECParameters p = X962NamedCurves.GetByOid(X9ObjectIdentifiers.Prime192v1);
ECDomainParameters spec = new ECDomainParameters(p.Curve, p.G, p.N, p.H);
ECCurve curve = spec.Curve;
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("651056770906015076056810763456358567190100156695615665659"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.DecodePoint(Hex.Decode("0262B12D60690CDCF330BABAB6E69763B471F994DD702D16A5")), // Q
spec);
ISigner sgr = SignerUtilities.GetSigner("SHA1withECNR");
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
checkSignature(192, priKey, pubKey, sgr, k, message, r, s);
}
// -------------------------------------------------------------------------
/**
* SEC 2: Recommended Elliptic Curve Domain Parameters - September 2000,<br/>
* Page 17-19, Recommended 521-bit Elliptic Curve Domain Parameters over Fp<br/>
* an ECC example with a 521 bit prime and a 512 bit hash
*/
[Test]
public void TestECNR521bitPrime()
{
BigInteger r = new BigInteger("1820641608112320695747745915744708800944302281118541146383656165330049339564439316345159057453301092391897040509935100825960342573871340486684575368150970954");
BigInteger s = new BigInteger("6358277176448326821136601602749690343031826490505780896013143436153111780706227024847359990383467115737705919410755190867632280059161174165591324242446800763");
byte[] kData = new BigInteger("cdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef", 16).ToByteArrayUnsigned();
SecureRandom k = FixedSecureRandom.From(kData);
X9ECParameters p = SecNamedCurves.GetByOid(SecObjectIdentifiers.SecP521r1);
ECDomainParameters spec = new ECDomainParameters(p.Curve, p.G, p.N, p.H);
ECCurve curve = spec.Curve;
ECPrivateKeyParameters priKey = new ECPrivateKeyParameters(
new BigInteger("5769183828869504557786041598510887460263120754767955773309066354712783118202294874205844512909370791582896372147797293913785865682804434049019366394746072023"), // d
spec);
ECPublicKeyParameters pubKey = new ECPublicKeyParameters(
curve.DecodePoint(Hex.Decode("02006BFDD2C9278B63C92D6624F151C9D7A822CC75BD983B17D25D74C26740380022D3D8FAF304781E416175EADF4ED6E2B47142D2454A7AC7801DD803CF44A4D1F0AC")), // Q
spec);
ISigner sgr = SignerUtilities.GetSigner("SHA512withECNR");
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
checkSignature(521, priKey, pubKey, sgr, k, message, r, s);
}
private void checkSignature(
int size,
ECPrivateKeyParameters sKey,
ECPublicKeyParameters vKey,
ISigner sgr,
SecureRandom k,
byte[] message,
BigInteger r,
BigInteger s)
{
sgr.Init(true, new ParametersWithRandom(sKey, k));
sgr.BlockUpdate(message, 0, message.Length);
byte[] sigBytes = sgr.GenerateSignature();
sgr.Init(false, vKey);
sgr.BlockUpdate(message, 0, message.Length);
if (!sgr.VerifySignature(sigBytes))
{
Fail(size + " bit EC verification failed");
}
BigInteger[] sig = derDecode(sigBytes);
if (!r.Equals(sig[0]))
{
Fail(size + "bit"
+ ": r component wrong." + SimpleTest.NewLine
+ " expecting: " + r + SimpleTest.NewLine
+ " got : " + sig[0]);
}
if (!s.Equals(sig[1]))
{
Fail(size + "bit"
+ ": s component wrong." + SimpleTest.NewLine
+ " expecting: " + s + SimpleTest.NewLine
+ " got : " + sig[1]);
}
}
protected BigInteger[] derDecode(
byte[] encoding)
{
Asn1Sequence s = (Asn1Sequence) Asn1Object.FromByteArray(encoding);
return new BigInteger[]
{
((DerInteger)s[0]).Value,
((DerInteger)s[1]).Value
};
}
public override string Name
{
get { return "ECNR"; }
}
public override void PerformTest()
{
TestECNR192bitPrime();
TestECNR239bitPrime();
TestECNR521bitPrime();
}
public static void MainOld(
string[] args)
{
RunTest(new ECNRTest());
}
}
}
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